阅读说明：本技术 一种钢质防火门芯板 (Steel fireproof door core plate ) 是由 王雨竹 于 2019-09-30 设计创作，主要内容包括：本发明涉及一种钢质防火门芯板,包括芯板本体,其特征在于：所述芯板本体由靠近铰链侧的低密度芯板和靠近门锁侧的高密度芯板两部分组成,且所述低密度芯板与高密度芯板的连接部位相互浇融为一体。其既能够弥补安装锁具后芯板本体薄弱的缺陷,又能够保证芯板本体的整体强度、提高钢质防火门的耐火隔热性；且成本低,可靠性好。(The invention relates to a steel fireproof door core plate, which comprises a core plate body and is characterized in that: the core board body is composed of a low-density core board close to the hinge side and a high-density core board close to the door lock side, and the connecting parts of the low-density core board and the high-density core board are mutually cast and fused into a whole. The core plate body is not only capable of making up the defect that the core plate body is weak after the lockset is installed, but also capable of ensuring the integral strength of the core plate body and improving the fire resistance and heat insulation of the steel fireproof door; and the cost is low and the reliability is good.)

1. The utility model provides a fire door core is prevented to steel, includes core body (1), its characterized in that: the core board body (1) is composed of a low-density core board (11) close to the hinge side and a high-density core board (12) close to the door lock side, and the connecting parts of the low-density core board (11) and the high-density core board (12) are mutually cast and fused into a whole.

2. The steel fire door core panel of claim 1, wherein: the ratio of the width of the high-density core plate (12) to the width of the core plate body (1) ranges from 0.2 to 0.3.

3. The fire door core panel made of steel as claimed in claim 1 or 2, wherein: the density range of the low-density core plate (11) is 290-350(kg/m3), and the density range of the high-density core plate (12) is 380-410(kg/m 3).

Technical Field

The invention relates to a fireproof door, in particular to a steel fireproof door core plate.

Background

The lock is installed on the door leaf of the steel fireproof door, so that the door core plate close to the door lock side is weak, and the fireproof and heat-insulating properties are poor. When a fire disaster occurs, under the action of high-temperature flame, the highest temperature of the door core plate close to the door lock side is easy to exceed the standard requirement, so that the fire resistance and the heat insulation of the steel fireproof door are lost. Therefore, the existing steel fireproof door core plate needs to be improved.

Disclosure of Invention

The invention aims to provide a core plate of a steel fireproof door, which can not only make up the defect of weakness of a core plate body after a lockset is installed, but also ensure the integral strength of the core plate body, improve the fireproof and heat-insulating properties of the steel fireproof door, and has low cost and high reliability.

The invention relates to a steel fireproof door core plate, which comprises a core plate body and is characterized in that: the core board body is composed of a low-density core board close to the hinge side and a high-density core board close to the door lock side, and the connecting parts of the low-density core board and the high-density core board are mutually cast and fused into a whole.

further, the ratio of the width of the high-density core board to the width of the core board body ranges from 0.2 to 0.3.

Further, the density of the low-density core board ranges from 290kg/m3 to 350kg/m3, and the density of the high-density core board ranges from 380kg/m3 to 410kg/m 3.

The invention has the beneficial technical effects that:

The core plate body consists of a low-density core plate close to the hinge side and a high-density core plate close to the door lock side, and the connecting parts of the low-density core plate and the high-density core plate are mutually poured and integrated, so that the defect that the core plate body is weak after the lockset is installed is overcome, the integral strength of the core plate body is ensured, and the fire resistance and heat insulation of the steel fireproof door are improved; because the range value of the width of the high-density core plate and the width of the core plate body is limited to 0.2-0.3, the cost and the performance of the core plate body reach an optimal interval, the cost is low, and the reliability is high.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1-core board body, 11-low density core board, 12-high density core board.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

Referring to fig. 1, a steel fire door core board that shows includes core board body 1, its characterized in that: the core board body 1 is composed of a low-density core board 11 close to the hinge side and a high-density core board 12 close to the door lock side, and the connecting parts of the low-density core board 11 and the high-density core board 12 are mutually cast and fused into a whole. The high-density core plate 12 is adopted at the side close to the door lock, namely, the density of the core plate body 1 is locally improved, so that the strength of the core plate body 1 close to the door lock side is improved, and the defect that the core plate body 1 is weak after the lockset is installed is overcome; because the connection parts of the high-density core plate 12 and the low-density core plate 11 are mutually fused, the overall strength of the core plate body 1 can be ensured, and meanwhile, the fire resistance and heat insulation of the steel fireproof door can be improved.

The ratio of the width of the high-density core board 12 in the door width direction to the width of the core board body 1 in the door width direction is in the range of 0.2 to 0.3. The range value of the width of the high-density core plate 12 and the width of the core plate body 1 is limited to 0.2 to 0.3, so that the cost and the performance of the core plate body 1 can reach an optimal range.

The density range of the low-density core plates 11 is 290-350(kg/m3), and the density range of the high-density core plates 12 is 380-410(kg/m 3).

The slurry of the low-density core plate 11 and the slurry of the high-density core plate 12 are formed by mixing magnesium oxide solution and magnesium chloride solution according to different proportions.

When the core board body is manufactured, firstly, magnesium oxide solution and magnesium chloride solution are manufactured into low-density core board slurry and high-density core board slurry according to different proportions, the low-density core board slurry and the high-density core board slurry are respectively stirred by two stirrers, and the stirred low-density core board slurry and high-density core board slurry are simultaneously injected into a core board cavity along the width direction of a door leaf; after injection, the adjacent edges of the low-density core board and the high-density core board are fused together. The core plate can not only make up the defect that the core plate body is weak after the lockset is installed, but also ensure the overall strength of the core plate body and improve the fire resistance and heat insulation of the steel fireproof door.